# A024197 (b-file synthesized from sequence entry) 1 15 2 176 3 950 4 3480 5 10045 6 24640 7 53676 8 106800 9 197835 10 345840 11 576290 12 922376 13 1426425 14 2141440 15 3132760 16 4479840 17 6278151 18 8641200 19 11702670 20 15618680 21 20570165 22 26765376 23 34442500 24 43872400 25 55361475 26 69254640 27 85938426 28 105844200 29 129451505